| Author: | Liu, Jianing |
| Title: | Evaluating the natural ventilation performance of different window types |
| Advisors: | Lee, Wai Ling (BSE) |
| Degree: | M.Eng. |
| Year: | 2018 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Windows -- China -- Hong Kong Natural ventilation Dwellings -- Heating and ventilation |
| Department: | Department of Building Services Engineering |
| Pages: | viii, 71 pages : color illustrations |
| Language: | English |
| Abstract: | Hong Kong is a typical subtropical city where the climate is always warm during the winter. Therefore, unlike other cool climate regions, the natural ventilation is preferred in Hong Kong during the winter as well as the summer. And natural ventilation can also provide better indoor environment quality and energy conservation. Natural ventilation performance of a residential unit is affected by internal as well as external factors. External factors are often subject to constraints beyond the control of site planners and architects. Internal factors include opening configurations and window types, which site planners and architects are free to design the way they deem proper. However, little information is available about their precise impact. A previous study on opening configurations identified the best and the worst out of twelve configurations. The best was with cross ventilation and the worst was with single-sided ventilation. In this study, the focus is on the natural ventilation performance of top-hung and side-hung windows. CFD simulations were performed based on the best and worst opening configurations, different building orientations, and varying wind conditions, to evaluate the natural ventilation performance of different window types on natural ventilation performance using the air change per hour (ACH) as the criteria. Two common window types in Hong Kong were studied, namely side hung and top hung. Evaluation results indicate that for both cross ventilation and single-sided opening configurations, side hung windows performed much better than the top hung windows. It can be concluded that better natural ventilation performance can be achieved using side hung windows. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991022168752003411.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 1.72 MB | Adobe PDF | View/Open |
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